The Mitchelton-Scott team and title contender Steven Kruijswijk have withdrawn from the Giro d'Italia after the latest round of Covid-19 testing.
Jumbo-Visma's Dutchman Kruijswijk and Team Sunweb's Michael Matthews tested positive as did four staff members of the Australian team, from 571 tests.
"As a social responsibility we've made the decision to withdraw," said Mitchelton-Scott boss Brent Copeland.
Their British rider Simon Yates tested positive before stage eight.
Kruijswijk, ruled out of last month's Tour de France because of a shoulder injury, said: "Within the team we take a lot of measures to avoid contamination.
"And I just feel fit. I can't believe I got it. It is a very big disappointment to get this news. It is a pity that I have to leave the Giro this way."